Meter-register.



L. H. NASH.

METER REGISTER.

AYPLIOATION FILED JUNE 2, 1906.

Patented May 3, 1910.

wi tvwweo UNITED STATES PATENT OFFICE.

LEWIS HALLOCK NASH, OF SOUTH NORWALK, CONNECTICUT, ASSIGNOR TO NATIONALMETER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

METER-REGISTER.

Specification of Letters Patent.

Patented May 3, 1910.

To all whom it may concern:

Be it known that I, LEWIS HALLOOK NASH, a citizen of the United States,and a resident of South Norwalk, in the county of Fairfield and State ofConnecticut, have invented a certain new and useful Improvement inMeter-Registers, of which the following is a s ecification.

-My inventlon relates to meters and has particular application tocertain improvements in water meters, and especially those of the typecommonly known as magnetic meters.

' The invention consists in the construction,

combination and arrangement of parts set forth in and falling within thescope of the appended claims.

In the accompanying drawings wherein I have illustrated one embodimentof the invention, Fi re 1 is a vertical, longitudinal sectional v1ewtaken through a magnetic water meter embodying the invention; Fig.

2 .is a detail, sectional view showing one of the magnets and the meansfor annexing the same for the purpose hereinafter set forth; Fig. 3 is aview in cross section showing the application of the shield to the lowermagnetof the meter.

Referring now to the accompanying drawings in detail, and particularlyto-Fig. 1 thereof, the letter A indicates the upper casing of themeasuring chamber of a water meter, while A is a vane or PIOJGCUOD onshaft I, upon the lower end of which is.

afiixed the permanent magnet J lying withm the field of the magnet C anddesigned to be revolved under the influence ofthe magnet C to actuatethe register mechanism in a well known manner. L is a protective covermade of magnetic material, as iron attached to the meter case by meansof the screw M and provided with an opening 0,

and a lid or cover N. This covering forms a shoulder P over the baseplate of the chamber containing the register mechanism and holds thesame in place.

The mechanism above described forms the subject-matter of anotherapplication which I have filed under date of September 27, 1905, andwhich is serially numbered 280,260.

I have found by experience that the upper magnet J connected with andadapted to actuate the registering mechanism is liable to be unfavorablyinfluenced by the mag netic lines of force passing through theprotective coverings of the registering casing and through certainadjacent portions of the meter casing. In a word, if a magnetbe placedadjacent to the meter in such manner that the magnetic lines will passthrough the casings of the mechanism in adirection to intersect eitherthe magnets J or C, such magnetic lines set up a force which interfereswith the operation of the magnets. This aflords an opportunity forevil-disposed persons to tamper with the registering mechanism and causeit to falsify the record. It is, therefore, desirable to provide somemeans for reducing, and, as far as possible, preventing extraneousmagnetic lines of force intersecting said magnets and, particularly,magnet J, which is most injuriously affected thereby. To accomplish thisit is necessary to provide some agency for conducting the lines of forcearound the magnet, and to accomplish this I have devised means which maybe briefly enumerated as follows: The means consist of a magneticshield. composed of a plurality of layers of magnetic material with oneor more intervei ing air spaces between them. The

presence of an air space between two magnetic layers acts to condenseinto the outer layer all the lines of force which will readily pass andso leave but a relatively small number of magnetic lines to reach theinner shield. The inner shield being, for this reason, far below thecondition of magnetic saturation, readily conducts said lines andprevents their passage into the space containing the magnet. The airspace, therefore, performs an important function and the larger the airspace the more protection is afforded. I have shown the magnetic shieldas composed of suitable magnetic material, preferably iron. In thedrawings the magnetic shield which, as aforesaid, is composed of aplurality of layers of magnetic material, is adapted to fit over themagnet J In Figs. 1 and 2 I have shown the plurality of layers ofmagnetic material and in said figures S designates the inner layer ofthe shield of sufficient size to permit the magnet to revolve freelywithin the space it incloses, such layer being seated in a depression asshown at s. The second layer or cap S of the shield is relatively largerthan that shown at S and is adapted to partially envelop or incase thefirst-mentioned layer or cap being spaced apart therefrom to pro: videan intervening air space S To similarly protect magnet C I may, ifdesired, provide this with a cap as shown in Fig. 3, said cap beingindicated by the character 8 and covering and protecting the magnetinthe same manner as the upper magnet is protected by the caps or layers SS.

Having thus described my invention, what I claim is:

1. In a meter, the combination with a registering mechanism, of meansfor operating said mechanism including a magnet, and

a magnetic shield composed of a plurality of layers of magneticmaterial, with an intervening air space between them, said shieldinclosing said magnet.

2. In a meter the combination with a registering mechanism, of means foroperating the latter including a magnet, and means for preventing theinfluencing of the magnet by unfavorable magnetic forces, said meansincluding a protecting shield composed of a plurality of layers ofmagnetic material with an intervening air space between said layers, anda covering extending over said shield.

3. In a meter, the combination with the registering mechanism, a magnettherefor, a second magnet operating the first mentioned magnet, meansfor protecting the first mentioned magnet against unfavorable magneticforces, such means comprising a shield formed of a plurality of layersof magnetic material with intervening air spaces be tween the layers.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LEWIS I-IALLOCK NASII.

Witnesses:

W. A. PAULING, Jos. J. PIERANDO.

